Fade In not working.

Fade In not working.

Hi,

Why on the face of the earth this does nothing when pressing the button ?

  1. <!DOCTYPE html>
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title></title>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
        <script>
            $("#btFadeIn").click(function () {
                $('PictureHolder').fadeIn('slow');
            });
        </script>
    </head>
    <body>
        <div id="PictureHolder" style="background-color:red;width:300px;height:200px;" >
            <img id="img" class=".img" src="Images/LeverDeSoleil.jpg" style="padding-left:5px;padding-top:5px;width:290px;height:190px" />
        </div>
        <br />
        <button id="btFadeIn">Fade in</button>
    </body>
    </html>